Virginity
denotes the state of a person who has not taken part in sexual
intercourse; sexual intercourse (also called coitus, or copulation) is
reproductive act in which the male reproductive organ enters the female
reproductive tract, if the reproductive act is complete, sperm cells
are passed from the male body into the female, in the process
fertilizing the female egg and forming a new organism.

This
biological definition explains the ultimate goal of sexual intercourse
and corresponds well with St. Thomas Aquinas teaching. On the basis of
teleology, every emission of seed that takes place in such a way that
generation cannot result or suitably result is against the good of the
human being. Thus, if this is purposely done, it is a sin. The
inordinate emission of seed opposes the good of the nature which is the
preservation of the species.

Virginity
of the spouses ends in consummation of a marriage, which is a conjugal
act which is suitable in itself for the procreation of offspring, to
which marriage is ordered by its nature and by which the spouses become
one flesh. First
sexual intercourse is the most memorable milestone of human
development, this is why virginity offered to the spouse is the most
precious wedding gift. Obviously, virginity lost before marriage cannot
be offered since this valuable asset is unrenewable.

I
find sex an important sphere of human life. I know my body well and I
have learned how to relieve my sexual urges on my own without any risk
to my physical integrity. But when I fall in love I appreciate intimate
direct sexual contacts with my sweetheart who loves me strongly enough
not to expose me to variety of risks resulting from any form of
penetration. It’s simple: penis - in - vagina sex
is needed
for a married couple to conceive, while oral and anal sex is
unhygienic, disgusting, and dangerous. All of my many friends accept my
lifestyle, otherwise they wouldn’t deserve my friendship. Neither
consciously nor, to my best knowledge and belief, unconsciously, I have
been forced to have sexual intercourse so I’m still a virgin, and will
preserve my virginity until marriage.

Warning

Oral
and anal penetration do not take virginity but can be more dangerous
than sexual intercourse. Oral and anal penetration, involving
insertion of the penis into the mouth or the anus, do not take
virginity, but in participants of these sexual practices result in more
sexually transmitted infections than the vaginal penetration. Why? The
answer is here: Sexually Transmitted Disease Prevention